-- @testpoint: opengauss关键字nchar(非保留)，作为函数名,部分测试点合理报错

--关键字不带引号-失败
drop function if exists nchar;
create function nchar(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/
--关键字带双引号-成功
drop function if exists "nchar";
create function "nchar"(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/
--关键字带单引号-合理报错
drop function if exists 'nchar';
create function 'nchar'(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/
--关键字带反引号-合理报错
drop function if exists `nchar`;
create function `nchar`(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/
--清理环境
drop function if exists "nchar"(integer);